Nardo > OP > Clorox for me. I first watched Nardo in 2006 and got really into it around the Tsunade arc, started reading the manga in ~2009 on youtube of all places. I essentially stopped caring about the plot after the pain arc, but it was still entertaining to me. As flawed as the war arc was, it still had some of my favourite moments. Nardo anime also has great music. I got into OP around the time the timeskip happened in the manga and while it manages to entertain me every once in a while, Oda makes it impossible for me to truly care about either the plot, characters or fights. Never got into Clorox, something about Kubo's artstyle always rubbed me the wrong way. Maybe I'll give it another try some day.